Question about air fuel gauges
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The air/fuel gauges inside the car...where do they hook up and how do they work? Oil, Temp and others are easy to understand, but with A/F it is dealing with 2 different things, so I'm curious, unless it just plugs into the pcm. I also wonder if they are accurate?
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Originally Posted by The Kiss Guy
The air/fuel gauges inside the car...where do they hook up and how do they work? Oil, Temp and others are easy to understand, but with A/F it is dealing with 2 different things, so I'm curious, unless it just plugs into the pcm. I also wonder if they are accurate?
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Cool. I was thinking of getting a gauge pillar sometime soon and the A/F was going to be one of the gauges. I know dyno tuning can get you close, but would love to have a gauge telling me the A/F while speeding down the strip.
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Originally Posted by The Kiss Guy
Actually, wouldn't that be more accurate than the tail pipe sensors used on the dyno? Seems it would be.
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No it won't be more accurate b/c it is based off an already inconsistant stock 02. The actual WideBand 02 used by dyno's is a ton more accurate. The stock oxygen sensors are OK for tuning purposes really. They can get you in the ballpark, but thats about it IMO.
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Originally Posted by The Kiss Guy
Cool. I was thinking of getting a gauge pillar sometime soon and the A/F was going to be one of the gauges. I know dyno tuning can get you close, but would love to have a gauge telling me the A/F while speeding down the strip. ![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
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Originally Posted by chris89gta
No it won't be more accurate b/c it is based off an already inconsistant stock 02. The actual WideBand 02 used by dyno's is a ton more accurate. The stock oxygen sensors are OK for tuning purposes really. They can get you in the ballpark, but thats about it IMO.
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The reason it fluxuates so much at idle or cruising is b/c that is what the 02 sensors do. They go up and down constantly trying to keep a 14.7:1 A/F at idle and cruise, unless programed otherwise. If you have a stock tune, they yeah the A/F guage will show RICH b/c the stock program is rich as hell. GM did that for a reason, so it wouldn't run lean and then they would have to replace a ton of motors...
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One thing to remember is when the fluxuations of the lights (flipping back and forth) seem to be slower than usual indicates that your 02 sensor is going bad.
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Just a warning to all that have one.......the A/F guage that I had was constantly making my 02's go bad. I know this b/c I logged different runs, one with the guage hooked up and one without the gauge hooked up and I got two totally different readings on both of the front 02's. I talked with a couple of ppl about it and we concluded that it was drawing voltage out of the o2 forcing the computer to dump more fuel then needed which was burning up my o2's up about once every 3 months. I strongly suggest not hooking up one of these up IMHO.
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Originally Posted by JakeY2KZ
Just a warning to all that have one.......the A/F guage that I had was constantly making my 02's go bad. I know this b/c I logged different runs, one with the guage hooked up and one without the gauge hooked up and I got two totally different readings on both of the front 02's. I talked with a couple of ppl about it and we concluded that it was drawing voltage out of the o2 forcing the computer to dump more fuel then needed which was burning up my o2's up about once every 3 months. I strongly suggest not hooking up one of these up IMHO.
I haven't had any problems in over a year on my Z or my Ram pick up that had one for 3 years. I think that if you follow AutoMeter's instructions and use wiring of the recommended gauge everything should be fine.